Definition: In this task, you are given an input list A. You need to extract and sort the unique digits used in the list in ascending order. Return -1 if there is no digit in the list.
Input: ['s', '67', 'h', '475', '387', '123', 'm', 'f', 'o', 'o', '31']

1, 2, 3, 4, 5, 6, 7, 8